The transfer is most reliable at 19200 bps, any higher and the data sent may be more or less than expected.

PC Setup:

Install ADF Sender Terminal and configure the serial preferences to match the Amiga's, then open the Comm port.

PC ADF -> Amiga DF0:

Amiga: [CLI/SHELL]
transdisk -w ser: -d trackdisk 0

PC: [ADF Sender Terminal]
Press Send and select the ADF you wish to transfer to the floppy disk in drive DF0:

Amiga DF0: -> PC ADF

PC: [ADF Sender Terminal]
Enter the size of the destination file, for every track it's 11264 bytes, so tracks 0 through 79 is (11264 * 80) 901120 bytes, then click on Receive.

Amiga: [CLI/SHELL]
transdisk >ser: -d trackdisk 0

Both scenarios should return to the command line after the transfer completes, if either stops short then you should consider lowering the Baud Rate. Although i have been able to transfer at 115200 bps without errors using Transwarp in place of Transdisk.

If you don't possess Transdisk/warp and or have no way of getting it over to your amiga, refer to this page.